Journal
BIOSENSORS & BIOELECTRONICS
Volume 89, Issue -, Pages 721-727Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2016.11.020
Keywords
ATP; Self-assemble; Fluorescence probe; Energy transfer; H2O2 detection; Glucose detection
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Funding
- NSFC [21475056, 21265017, 21265016]
- Program for New Century Excellent Talents in University [NCET-13-0848]
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A bimetal lanthanide coordination polymer nanoparticle (ATP-Ce/Tb-'his CPNs) with good biocompatibility was synthesized in Tris-HCl buffer using adenosine triphosphate (ATP) molecules as the bridge ligands. The large absorption cross section and suitable emission energy of Ce3+ matching to the adsorption energy of Tb3+(4f) results in the efficient energy transfer from Ce3+ to Tb3+, thus the synthesized ATP-Ce/Tb-Tris CPNs exhibit the characteristic green emission of Tb3+. Such energy transfer from metal to metal in fluorescent lanthanide coordination polymer nanoparticles (Ln-CPNs) has been demonstrated. It is found that the oxidation of Ce3+ in ATP-Ce/Tb-Tris CNPs to Ce4+ would interrupt the energy transfer from Ce3+ to TV', leading to fluorescence quenching of Tb3+. On the basis of this quenching mechanism, ATP-Ce/Tb-Tris CPNs has been successfully used to detect reactive oxygen H2O2 with detection limit as low as 2 nM. If glucose oxidase is present in the system, glucose can be determined using the ATP-Ce/Tb-Tris CNPs nanosensor.
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